"but be careful - for some engines (Turbo'd Lycomings - TIO-540) the recommendation for 'best power' puts the engine in the worst possible operating conditions (50 degrees rich of peak EGT - where the peak cylinder temps and pressures are). "
Thanks Bevan,
the company I am with lean to 50 degrees rich of peak egt all the time at all cruise power settings, can you elaborate on why thats the worst condition?